Remote temperature indicator



Jan. 9, 1934. c. A. DE GlERs REMOTE TEMPERATURE INDICATOR Original Filed 0G12. lI 1930 W-mm /, iNVENTOR BY (Inl/f f/ ATI'ORNEY .plication is a divisi adapting it to UNITED STATES PATENT OFFICE 1,943,267 REMOTE TEMPERATURE -INDICATOR Clarence A. de Giers, Forest Hills, N. Y., assigner,

This invention p rt vices of the hydraulic flcation adapted for by mesne assignments, to Richard New York, N. Y.

Original application October i 485,808. Divided and this 1932. Serial No. 607,683

C. Murphy,

1, 1930, serial No. application April 27,

1 Claim. (Cl. Z3-52) ains to remote control detype, particularly a modiuse as a thermometer giving an indication of temperature on a dial.` This ap- 485,808, filed 1,881,266 issued october 4, 1932.

on of my application Serial The drawing shows a thermometer with remote indicator and temperature compensator, the indicator being a chart.

A bulb 304 is pointer moving over a fan shaped provided with a screw thread .306` be screwed into a boiler or other vessel in which it is desired to take temperature observations; A tube The above described 308 extends from the inner apparatus will give corgauge, conduit, and transat a fixed temperature, but

will give incorrect results if said temperature varies. In order to insure correct indications under changeable temperatures, tube 316 and sylphon 318 are provided. Tubes 308 and 316'being similar and of the same length outside of bulb 304, and sylphons 314 and 318 being similar, any change of atmospheric temperature will ailect give correct indications lof temperature within the bulb, regardless of changes of temperature without the bulb.

It is to be understood that the invention is not limited to the specic embodiment herein illusl by the following claim.

Apparatus for indicating temperature at a remote point, comprising in combination, a bulb pted to be exposed-to change of temperature, an indicator remote from said bulb, and a pair of sylphons operatively connected to said indicator, one of said sylphons being connected by a tube to the interior of said bulb, the other sylphon similar tube leading to said bulb but closed at its end adjacent the bulb, said first sylphon being eifective to move said indicator in response to change of temperature of said bulb, and said second sylphon being effective to compensate for change of temperature of parts of between said bulb and said indicator, said indicator including a pointer, and the means for operatively connecting said sylphons to said indicator including a link fulcrumed on said pointer and means for pivotally connecting each of said sylphons to an opposite end of said link, substantially as described.

CLARENCE A. DE GIERS. 

